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Effect of Pregelatinized Starch on the Properties of Poly (Vinyl Alcohol) Film for the Water-Soluble Laundry Bag
Paper Type  |
Contributed Paper |
Title |
Effect of Pregelatinized Starch on the Properties of Poly (Vinyl Alcohol) Film for the Water-Soluble Laundry Bag |
Author |
Montree Sangthongdee, Supanut Phattarateera and Poonsub Threepopnatkul |
Email |
threepopnatkul_p@su.ac.th |
|
Abstract: The goal of this study was to develop pregelatinized starch (P-St) and polyvinyl alcohol (PVOH) films as water-soluble laundry plastic bags to avoid having contact with COVID-19 infected clothes by extrusion method. The effects of pregelatinized starch (P-St) content on the properties of polyvinyl alcohol (PVOH) films were examined. PVOH and P-St blend were compounded by twin-screw extruder with various P-St content of 0, 10, 20, 30, and 40% by weight with fixed glycerol content of 20 phr. The blend films were produced by blown film extrusion. The chemical structure, thermal properties, water-solubility, mechanical properties, and the cross-sections morphological properties of PVOH/G/P-St were characterized. As a result, the formation of intermolecular interactions between PVOH, glycerol and P-St was confi rmed by FTIR. Moreover, the addition of P-St on PVOH could reduce the thermal stability due to the content of P-St with amylose, a substance of amorphous structure, affecting the chains flexibility of PVOH/G/P-St. From the differential scanning calorimeter result, the glass transition temperature was increased with the increment of P-St content because the chains entanglement between PVOH and P-St had affected the reduction in crystallinity and led to the decrement of the melting temperature. Furthermore, the water solubility would strongly be dependent on the percentage of the gelatinized starch (%GS). The solubility decreased as the percentage of the GS increased. In addition, PVOH with 20% of P-St film possessed the highest value in tensile strength and modulus, and the particles of P-St have a good distribution in PVOH/G indicating to stronger interaction of P-St and PVOH/G. |
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Start & End Page |
1604 - 1617 |
Received Date |
2022-06-23 |
Revised Date |
2022-09-09 |
Accepted Date |
2022-09-12 |
Full Text |
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Keyword |
poly (vinyl alcohol), pregelatinized starch, solubility films, water-soluble laundry bag |
Volume |
Vol.49 No.6 (November 2022) |
DOI |
https://doi.org/10.12982/CMJS.2022.096 |
Citation |
Sangthongdee M., Phattarateera S. and Threepopnatkul P., Effect of Pregelatinized Starch on the Properties of Poly (Vinyl Alcohol) Film for the Water-Soluble Laundry Bag, Chiang Mai Journal of Science, 2022; 49(6): 1604-1617. DOI 10.12982/CMJS.2022.096. |
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